2014 MERCEDES-BENZ C-CLASS SALOON ignition

X
Press and hold the _button upwards
until the desired position is reached.
or X Set the air distribution using Audio 20/
COMAND Online; see the separate operat-
ing instructions. Setting the airflow
THERMATIC automatic climate control X
Turn the key to position 2in the ignition
lock (Y page 181).
X To increase/reduce: press the upper or
lower section of the Hrocker switch.
or
X Set the airflow using Audio 20/COMAND
Online; see the separate operating instruc-
tions.
THERMOTRONIC automatic climate
control Setting the front-compartment airflow
You can set the airflow separately for the
front and rear compartment. X Turn the key to position 2in the ignition
lock (Y page 181).
X To increase/reduce: press the upper or
lower section of the Hrocker switch.
or
X Set the airflow using Audio 20/COMAND
Online; see the separate operating instruc-
tions.
Setting the rear compartment airflow X Turn the key to position 2in the ignition
lock (Y page 181).
X Press the upper or lower section of
the ! rocker switch.
The Audio 20/COMAND Online climate
control menu opens.
X Select the synchronisation function in the
climate control menu; see separate Audio 20/COMAND Online operating
instructions.
The airflow setting for the front area is
adopted for the rear compartment.
Setting the rear compartment airflow
using the rear control panel
X Turn the key to position 2in the ignition
lock (Y page 181).
X To increase/reduce: press the upper or
lower section of the K/Irocker
switch on the rear control panel.
The selected airflow level is shown in the
rear-compartment display. Activating/deactivating the synchro-
nisation function
General notes Climate control can be set centrally using the
synchronisation function. The temperature
setting is adopted for the front-passenger
side. For THERMOTRONIC automatic climatecontrol, the temperature setting is adopted
for the front-passenger side and rear com-
partment.
Activating/deactivating THERMATIC automatic climate control
without auxiliary heating
X Press the 0rocker switch up or down.
The indicator lamp in the 0rocker
switch lights up or goes out.
or
X Activate/deactivate the synchronisation
function using Audio 20/COMAND Online;
see the separate operating instructions).
The synchronisation function deactivates if
the settings for the front-passenger side are
changed. 162
Operating the climate control systemClimate control

THERMATIC automatic climate control
with auxiliary heating
X Activate/deactivate the synchronisation
function using Audio 20/COMAND Online;
see the separate operating instructions).
The synchronisation function deactivates if
the settings for the front-passenger side are
changed.
THERMOTRONIC automatic climate con-
trol
X Activate/deactivate the synchronisation
function using Audio 20/COMAND Online;
see the separate operating instructions).
The synchronisation function is deactivated:
R if the settings for the front-passenger side
are changed
R if the settings for the rear compartment are
changed Demisting the windscreen
General notes You can use this function to defrost the wind-
screen or to demist the inside of the wind-
screen and the front side windows.
Switch off the windscreen demisting function as soon as the windscreen is clear again.
Activating/deactivating the wind-
screen demisting function X
Turn the key to position 2in the ignition
lock (Y page 181).
X To activate: press the¬rocker switch
on the front control unit up or down.
The indicator lamp above the ¬rocker
switch lights up. The current climate con-
trol settings are deactivated.
The climate control system switches to the
following functions:
R high airflow
R high temperature R
air distribution to the windscreen and
front side windows
R air-recirculation mode off
i If necessary, the "Cooling with air dehu-
midification" function is activated. In this
case, the indicator lamp above the
¿ button remains switched off.
X To deactivate: press the¬rocker
switch up or down.
The indicator lamp above the ¬rocker
switch goes out. The previous settings are
reactivated. Air-recirculation mode
remains deactivated.
or
X Press the top or bottom section of the Ã
rocker switch. Demisting the windows
Windows misted up on the inside X
Activate the "Cooling with air dehumidifi-
cation" function with the ¿rocker
switch.
or
X Activate the cooling with air dehumidifica-
tion function via Audio 20/COMAND
Online; see the separate operating instruc-
tions.
For THERMOTRONIC automatic climate
control with auxiliary heating, the "Cooling
with air dehumidification" function can only be activated using Audio 20/COMAND
Online.
X Switch on automatic mode using the Ã
rocker switch.
X If the windows continue to mist up, activate
the windscreen demisting function using
the ¬ rocker switch.
i You should only select this setting until
the windscreen is clear again. Operating the climate control system
163Climate control

Windows misted up on the outside
X
Activate the windscreen wipers.
X Switch on automatic mode using the Ã
rocker switch.
i If you clean the windows regularly, they
do not mist up so quickly. Rear window heating
General notes The rear window heating has a high current
draw. You should therefore switch it off as
soon as the window is clear. It otherwise
switches off automatically after several
minutes.
If the battery voltage is too low, the rear win-
dow heating may switch off.
Activating/deactivating X
Turn the key to position 2in the ignition
lock (Y page 181).
X Press the ¤rocker switch up or down.
The indicator lamp above the ¤rocker
switch lights up or goes out. 164
Operating the climate control systemClimate control

Problems with the rear window heating
Problem
Possible causes/consequences and
M
MSolutions The rear window heat-
ing has switched off
prematurely or cannot
be activated. The battery has not been sufficiently charged.
X Switch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window heat-
ing can be activated again. Activating/deactivating air-recircula-
tion mode
General notes You can also temporarily deactivate the flow
of fresh air manually if unpleasant odours are
entering the vehicle from outside. The air
already inside the vehicle will then be recir-
culated.
If you switch on air-recirculation mode, the
windows can mist up more quickly, in partic-
ular at low temperatures. Only use air-recir-
culation mode briefly to prevent the windows misting up.
Activating/deactivating X
Turn the key to position 2in the ignition
lock (Y page 181).
X To activate: press thegrocker switch
up or down.
The indicator lamp above the grocker
switch lights up.
Air-recirculation mode switches on automat-
ically:
R at high outside temperatures
R at high levels of pollution (THERMOTRONIC
automatic climate control only)
R in a tunnel (vehicles with a navigation sys-
tem only)
The indicator lamp above the grocker
switch is not lit when automatic air-recircula- tion mode is activated. Outside air is added
after about 30 minutes. X
To deactivate: press thegrocker
switch up or down.
The indicator lamp above the grocker
switch goes out.
Air-recirculation mode is deactivated auto-
matically:
R after approximately five minutes at outside
temperatures below approximately 5 †
R after approximately five minutes if cooling
with air dehumidification is deactivated
R after approximately 30 minutes at outside
temperatures above approximately 5 † if
the cooling with air dehumidification func-
tion is activated Convenience opening/closing using
the air-recirculation button G
WARNING
When the convenience closing feature is oper- ating, parts of the body could become trapped
in the closing area of the side window and the
sliding sunroof. There is a risk of injury.
Observe the complete closing procedure
when the convenience closing feature is oper-
ating. When closing make sure that no parts of the body are in the closing area. G
WARNING
During convenience opening parts of the body could be drawn in or become trapped
between the side window and window frame.
There is a risk of injury. Operating the climate control system
165Climate control
Z

Activating/deactivating
X
Turn the key to position 0in the ignition
lock or remove it (Y page 181).
X To activate: press the!rocker switch
up or down.
The indicator lamp above the !rocker
switch lights up.
The blower will run at a low speed regardless of the airflow setting.
If you activate the residual heat function at
high temperatures, only the ventilation will be
activated. The blower runs at medium speed.
X To deactivate: press the!rocker
switch up or down.
The indicator lamp above the !rocker
switch goes out.
Residual heat is deactivated automatically:
R after approximately 30 minutes
R when the ignition is switched on
R if the battery voltage drops
R when the auxiliary heating is switched on Perfume atomiser
Operating the perfume atomiser G
WARNING
If children open the perfume vial, they could
drink the perfume or it could come into con-
tact with their eyes. There is a risk of injury. Do not leave children unsupervised in the vehicle.
If the perfume liquid has been drunk, consult
a doctor. If perfume comes into contact with
your eyes or skin, rinse the eyes with clean
water. If you continue to experience difficul-
ties, consult a doctor. H
Environmental note Full perfume vials must not
be disposed of with house-
hold rubbish. They must be
collected separately and dis-
posed of in an environmen- tally responsible recycling
system.
Dispose of full perfume vials
in an environmentally
responsible manner and
take them to a special waste
collection point. :
Perfume lid
; Perfume vial
The perfume atomiser helps to improve driv-
ing comfort.
Using Audio 20/COMAND Online, you can:
R switch the perfume atomiser on/off (see
separate Audio 20/COMAND Online oper-
ating instructions)
R regulate the perfume intensity (see the sep-
arate Audio 20/COMAND Online operating
instructions)
The following conditions can affect your per-
ception of the perfume intensity:
R operating mode of the automatic climate
control
R interior temperature
R time of year/day
R air humidity
R physiological condition of occupants, e.g.
fatigue or hunger
The perfume atomiser can only be operated
when the automatic climate control is
switched on and is only active when the glove compartment is closed.
The perfume atomiser is provided with a pre-
filled perfume vial. You can also choose from Operating the climate control system
167Climate control Z

Problems with the pre-entry climate control
Problem
Possible causes/consequences and
M
MSolutions The pre-entry climate
control cannot be
switched on or has
switched itself off. The charge status of the high-voltage battery is under the specified
minimum charge status.
X Start the engine when the vehicle is at a standstill.
The internal combustion engine drives the electric motor. The
electric motor is operating as an alternator. The high-voltage
battery is charging.
Further information on charging the high-voltage battery
(Y page 416). The pre-entry climate control was started more than twice when
the engine was switched off.
X Switch on the engine and let it run for more than ten seconds.
X Try again to switch the pre-entry climate control on. The difference between the interior temperature and the desired
temperature is too small.
X Increase the difference between the interior temperature and
the desired temperature. Remote activation of heating and ven-
tilation system
General notes Remote activation is only available on vehi-
cles with the BlueEFFICIENCY package.
The driver's and front-passenger seat areas
can also be heated or ventilated when the
engine is switched off.
The starter battery must be sufficiently
charged before remote activation can be
switched on.
When the vehicle is heated, the following
functions are activated:
R seat heating
R rear window heating
R exterior mirror heating
When the vehicle is ventilated, the following
functions are activated:
R blower
R seat ventilation If you have activated ionisation using Audio
20/COMAND Online (see separate operating
instructions), it is activated together with the
remote activation function.
Activating/deactivating the remote
activation function X
To switch on remote activation: push the
climate control symbol button on the key.
The air-conditioning functions are switched on, for up to 10 minutes for heating and up
to 120 minutes for ventilation.
Remote activation switches off automatically if:
R the ignition is switched on, or
R the engine is started
Seat heating (heating), seat ventilation (ven-
tilation) and ionisation remain switched on
after starting the engine. Operating the climate control system
171Climate control Z

iliary heating could switch from ventilation
mode to heating mode or from heating mode to ventilation mode.
The auxiliary heating switches off when the
engine is switched off. The auxiliary ventila-
tion is not active if the engine is running.
The auxiliary heating/ventilation switches off
automatically after 30 minutes. This time limit can be altered. To do this, visit a qualified
specialist workshop.
You cannot use the auxiliary ventilation to
cool the vehicle interior to a temperature
lower than the outside temperature.
Before switching on X
Turn the key to position 2in the ignition
lock (Y page 181).
X Set the desired temperature using the
w rocker switch on the front control
unit.
or X Set the desired temperature using
Audio 20/COMAND Online; see the sepa-
rate operating instructions.
If you do not alter the temperature before
switching on the auxiliary heating, the last
temperature setting will be adopted.
Auxiliary heating or ventilation can also be
switched on if the manually set climate con-
trol is activated. Optimum comfort can be
attained when the system is set to automatic
mode. Set the temperature to 22 †.
You can activate or deactivate the auxiliary
heating/ventilation:
R using the rocker switch on the centre con-
sole (Y page 173)
R using the remote control (Y page 173)
The on-board computer can be used to spec- ify up to three departure times, one of which
may be preselected:
R using the remote control (Y page 173)
R using Audio 20/COMAND Online; see the
separate operating instructions Switching the auxiliary heating/venti-
lation on/off using the centre console
rocker switch The colours of the indicator lamps in the
rocker switch have the following meanings:
Blue Auxiliary ventilation switched on
Red Auxiliary heating switched on
Yellow Departure time preselected X
To switch the auxiliary heating/ventila-
tion on: press rocker switch :up or down.
The red or the blue indicator lamp above
rocker switch :lights up.
X To set the temperature: switch on auxili-
ary heating/ventilation.
Audio 20/COMAND Online is activated for approximately one minute.
X Set the desired temperature using
Audio 20/COMAND Online; see the sepa-
rate operating instructions.
X To switch the auxiliary heating/ventila-
tion off: press rocker switch :up or
down.
The red or the blue indicator lamp above
rocker switch :goes out.
Switching the auxiliary heating/venti-
lation on/off using the remote control General notes
Your vehicle comes with one remote control.
You may use two additional remote controls
for your vehicle. For more information, pleasecontact a qualified specialist workshop. Operating the climate control system
173Climate control Z

Useful information
i This Owner's Manual describes all mod-
els, series and optional equipment for your
vehicle that were available at the time of
going to press. National variations are pos- sible. Note that your vehicle may not be
equipped with all of the functions descri-
bed. This is also the case for systems and
functions relevant to safety.
i Read the information on qualified special-
ist workshops: (Y page 27). Running-in notes
Important safety notes
In certain driving and driving safety systems,
the sensors adjust automatically while a cer-
tain distance is being driven after the vehicle has been delivered or after repairs. Full sys-
tem effectiveness is not reached until the end
of this teach-in procedure.
Brake pads/linings and discs that are either
new or have been replaced only achieve opti- mum braking effect after several hundred kil-
ometres of driving. Compensate for the
reduced braking effect by applying greater
force to the brake pedal. The first 1,500 km
If you treat the engine with sufficient care
from the very start, you will be rewarded with excellent performance for the remainder of
the engine's life.
R Drive at varying road speeds and engine
speeds for the first 1,500 km.
R Avoid overstraining the vehicle during this
period, e.g. driving at full throttle.
R When changing gears manually, change up
in good time, before the rev counter needle
reaches Ôof the way to the red area of the
rev counter. R
Do not shift down a gear manually in order
to brake.
R Vehicles with automatic transmission: try
to avoid depressing the accelerator pedal
beyond the point of resistance (kickdown).
After 1,500 km, you may gradually accelerate the vehicle to full road and engine speeds.
You should also observe these notes on run-
ning-in if the engine or parts of the drive train
on your vehicle have been replaced.
Always observe the applicable speed limit. Driving
Important safety notes
G
WARNING
Objects in the driver's footwell may restrict
the clearance around the pedals or block a
depressed pedal. This jeopardises the oper-
ating and road safety of the vehicle. There is a risk of an accident.
Stow all objects securely in the vehicle so that
they do not get into the driver's footwell.
Always fit the floormats securely and as pre-
scribed in order to ensure that there is always sufficient room for the pedals. Do not use
loose floormats and do not place several floor-mats on top of one another. G
WARNING
Unsuitable footwear can hinder correct usage of the pedals, e.g.:
R shoes with thick soles
R shoes with high heels
R slippers
There is a risk of an accident.
Wear suitable footwear to ensure correct
usage of the pedals. G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect, for example, the power steering and the brake 180
DrivingDriving and parking